Pencil-sharpener.



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PENCIL SHARPENER.

(Application led Aug. 22, 1901.) (N0 Modal.)

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UNITED STATEs PATENT OFFICE.

DOCTOR F. OLIVER, OF FRUITVALE, CALIFORNIA.

. Y PENCIL-SHARPENER.

SPECIFCATIONforming part of Letters Patent No. 715,848, dated December 16, 1902.

Applicationled August 22, 1901. Serial No. 72,948. (No model.) 2

c being a vertically-reciprocatingl one and so arranged as to cut the Wood surrounding the end of the pencil to be sharpenedapproximately parallel with the axis of the pencil, the pencil being held lockedwithin a rotatable ferrule which is actuated or given a step rotation by means of the reciprocating planer or blade holding rod.

To comprehend the invention, reference should be had to the accompanying sheet of drawings, wherein- Figure lis a side view of the Sharpener with pencil therein; Fig. 2, a front view thereof; Fig. 3, a top plan View with'the pencil removed and the planer or blade -rod' in crosssection. Fig. 4 is a vertical sectional View of the sharpener, illustrating the manner of locking the pencil within its ferrule; and Fig. 5 is a detail side view of the Sharpener, the planer, its rod, and a portion of the penciltube being broken away.

In the drawings the letter A is used to indicate any suitable style of frame, which in the presentcaseis U orstirrup shaped. However, the shape of the frame is immaterial, it only being requisite that it have an upper and lower plate or support A A2. Through these plates or supports openings ct a are formed; and between said plates or supports is arranged what I shall term the pencil-ferrule. yThis ferrule consists of two sections B B', the upper end of the lower section B being screw-threaded and screwing into the lower screw-threaded end of the upper section B. SectionB is provided with a ange or collar b, which rests against the under face of the yplate or support A. The upper end of said section extends through opening a and is turned over,`so as to bear against the upper face of the plate or support A', although left free to turn within opening a.

The lower end of section B extends through opening ct of plate or support A2 and into tube B2, whichlk tube is secured to the under face of said plate or support. In practice I prefer to makethe frame or holder and tube integral. By the described manner of securing the pencil-ferrule within the holder or frame the same is prevented from slipping therefrom.

Vithin the ferrule is'fltted the lock-shell or pencil-clamp C, each end of said shell or clamp being slotted so as to provide a series oftongues b2. The ends of said shell or clamp rest against the inclined circular shoulders b' b2 of the ferrule. Through this shell or clamp the pencil Cl extends, and said pencil is locked within the ferrule by screwing the lower section B' into the upper section B. The screwing up of said section causes the inner shell orclamp C to ride upon the inclined shoulders b b2, thereby compressing .the tongues h2 and causing same to bite into the wood and firmly clamp the pencil.

The pencil-tube B2 is preferably closed at its lower end, and in the front thereof a longitudinal slot d is formed, Fig. 2 of the drawings.

Through square openings d d2 in the outer end of the plates or supports A A2 extends the rod C2. The lower opening d2 is somewhat nearer the line of tube B2, so as to cause the rod C2 to stand at an inward inclination of about forty-five (45) degrees, more or less. This rod is normally held up or outward by the pressure of the spring D, which surrounds the upper end portionY thereof projecting beyond the upper plate or support A. This spring bears upon the upper face of said plate and is held on said rod by means of plate or disk: D, secured to the upper end of said rod, Fig. 1 of the drawings.

To the lower end of the rod C2 is attached 95 by set-screw f the planer blade or knife D2, the cutting edge of which is adapted to project a slight distance below the lower end of the said rod. The set-screw works through a slot f cut in the body of the planer blade or IOO knife. Consequently the said blade or knife may be raised or lowered by simply loosening the set-screw.

To the under face of the rod C2, immediately below the upper plate or support A when the rod is raised its full upward stroke or distance, is attached an inclined cam g, which cam upon the upstroke of the said rod engages one of the series of teeth g projecting outwardly from the collar b of ferrulesection B. As the cam moves into engagement with the said teeth during the reciprocation of rod C2 it causes the ferrule to rotate one notch, which turns thepencil such a distance as to place a fresh surface of the end of the pencil being sharpened to the action of the planer blade or knife during the downstroke of the rod C2. In order that the ferrule may be held against back rotation or movement during the operation of sharpening, there is attached to the under face of the plate or support A a pawl g2. This pawl engages with the teeth g and holds the ferrule against back rotation.

To regulate the point to be given the pencil, gage-marks l 2 3 are cut in the penciltube, Fig. l. If a ne point is desired,the pencil is moved downward within the ferrule prior to being clamped until its lower end is in line with gage-mark 1. In case a blunt point be desired the pencil is adjusted to mark 3. As the planer blade or knife cuts at a given angle, an extreme fine point to the lead can only be secured by so adjusting the pencil as to receive the full stroke of the blade.

The blade or knife D2 is formed with an outwardly-projecting fiange or finger-piece h, which is held by the operator during the operation of sharpening.. The device will be found of easy operation by placing the thumb upon the bottom of the pencil-tube and using the foreinger to press down upon the flange or linger-piece h in order to force the rod C2 downward, permitting the spring D to retract the rod. With little practice the operator will readily work the plunger or planer rod with rapidity.

Opening d2 is sufficiently long to permit of slight play to rod O2, so as to enable the same to move inward with the sharpening of the pencil.

Having thus described the invention, what is claimed as new, and desired to be protected by Letters Patent, is

1. A pencil-sharpener consisting of a suitable frame, a rotatable pencil-holder mounted therein, a spring-held reciprocating rod working therethrough at an inclination to the axis of the pencil, a cutting-blade carried thereby, and connection between the said rod and the pencil-holder whereby the holder has a step rotation imparted thereto by the movement of the rod.

2. The combination with a suitable frame, of a pencil-tube extending therefrom, a rotatable pencil-holder consisting of two adjustable tubular sections working therein, an expansible or split pencil-clamp located within said holder so as to be opened or closed to clamp or release a pencil by the adjustment of the tubular sections, a reciprocating rod working through the frame at an inclination, a cutting-blade adj ustably attached to the lower end of said rod, and connection between said rod and pencil-holder, whereby the holder has a step rotation imparted thereto by the reciprocating movement of the rod.

In witness whereof I have hereunto set my hand.

DOCTOR F. OLIVER.

Vtitnesses:

N. A. ACKER, HARRY J. LAsK. 

